<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title> 不规则卡片 </title>
</head>
<body>
  <main class="main">
    <div class="rectangle">矩形</div>
    <div class="triangle">三角形</div>
    <div class="cicle">圆</div>
    <div class="parallelogram">平行四边形</div>
  </main>
  
</body>
</html>